<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <!-- 遍历数组 -->
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sortType = 2">年龄升序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 0">原降序</button>
        <ul>
            <li v-for="p in filPersons" :key="p.id">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>
    </div>
    <script>
        Vue.config.productionTip = false

        // 用computed实现
        new Vue({
            el:"#root",
            data:{
                keyWord:'',
                sortType:0, //0原顺序 1降序 2升序
                persons:[
                    {id:'001',name:"马冬梅",age:30,sex:"女"},
                    {id:'002',name:"周冬雨",age:31,sex:"女"},
                    {id:'003',name:"周杰伦",age:18,sex:"男"},
                    {id:'004',name:"温兆伦",age:19,sex:"男"}
                ]
            },
            computed:{
                filPersons(){
                    const arr =  this.persons.filter(p=>{
                        return p.name.indexOf(this.keyWord) !== -1
                    })
                    // 判断一下是否需要排序
                    if(this.sortType){
                        arr.sort((a,b)=>{
                            return this.sortType === 1 ? a.age-b.age : b.age-a.age
                        })
                    }
                    return arr
                }
            }
            
        })
    </script>
</body>
</html>